I've used the drawer thing it works well. You need to be careful how close the holes are drilled to the sides or you'll get splashing.King of diy did a smaller version out of storage drawers, i may try a play on that. Into a 75gallon i have laying around. I also have some unused rain barrels laying around I could try to figure somthing out with. Maybe them and some 5g buckets into a kind of a swirl filter.
